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@@ -1,11 +1,102 @@
-# Formatters
-This folder contains formatter configuration files to be used with IDEs as well as the [spotless](https://github.com/diffplug/spotless/blob/main/plugin-gradle/README.md) formatter expressed in the Gradle project in this directory.
+# Spine Runtimes Code Formatters
 
-You will need the following on your `PATH`:
+This directory contains formatting scripts and tools to ensure consistent code style across all Spine runtime implementations.
 
-- JDK 10+
-- clang-format 12.0.1 (i.e. `brew install clang-format`). Also set the environment variable `CLANGFORMAT` to the path of the `clang-format` executable.
-- dotnet format (i.e. `dotnet tool install -g dotnet-format`, comes with dotnet 6 out of the box)
-- tsfmt, (i.e. `npm install -g typescript-formatter`)
+## Scripts
 
-To run the formatter, invoke the `format.sh` script. This will shuffle around the Gradle config files, invoke spotless, then undo the config file shuffling. Invoking `./gradlew spotlessApply` from the `formatters/` directory will not work.
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+### format-cpp.sh
+Formats C/C++ source files using clang-format.
+- **Prerequisites**: clang-format 18.1.8
+- **Coverage**: All C/C++ files in spine-cpp, spine-c, spine-godot, spine-ue, spine-glfw, spine-sdl, spine-sfml, spine-cocos2dx, spine-ios, spine-flutter
+- **Configuration**: Uses .clang-format configuration file
+- **Behavior**: Batches all files in a single clang-format call for performance
+
+### format-csharp.sh
+Formats C# source files using dotnet format.
+- **Prerequisites**: .NET SDK with dotnet format tool
+- **Coverage**: All C# files in spine-csharp, spine-monogame, spine-unity
+- **Configuration**: Uses .editorconfig (temporarily copied to each project)
+- **Behavior**: Runs with --no-restore and --verbosity quiet to suppress warnings
+
+### format-dart.sh
+Formats Dart source files using dart format.
+- **Prerequisites**: Dart SDK
+- **Coverage**: All Dart files in spine-flutter
+- **Configuration**: Uses --page-width 120 parameter
+- **Behavior**: Formats all files in place
+
+### format-haxe.sh
+Formats Haxe source files using haxelib formatter.
+- **Prerequisites**: Haxe and haxelib formatter package
+- **Coverage**: All Haxe files in spine-haxe
+- **Configuration**: Uses hxformat.json configuration file
+- **Behavior**: Formats all files in place
+
+### format-java.sh
+Formats Java source files using a custom Eclipse formatter.
+- **Prerequisites**: Java JDK and Maven
+- **Coverage**: All Java files in spine-libgdx and spine-android
+- **Configuration**: Uses eclipse-formatter.xml configuration file
+- **Behavior**: Builds Eclipse formatter JAR if needed, only outputs changed files
+
+### format-ts.sh
+Formats TypeScript source files using typescript-formatter.
+- **Prerequisites**: Node.js and npm
+- **Coverage**: All TypeScript files in spine-ts and tests
+- **Configuration**: Uses tsfmt.json configuration files
+- **Behavior**: Uses npx to auto-download formatter, validates tsfmt.json consistency
+
+### setup-clang-format-docker.sh
+Helper script for GitHub Actions to set up clang-format via Docker.
+- **Prerequisites**: Docker
+- **Purpose**: Creates a wrapper script that runs clang-format 18.1.8 in a Docker container
+- **Usage**: Called by GitHub Actions workflow to ensure version consistency
+
+## Configuration Files
+
+- **.clang-format**: C/C++ formatting rules
+- **.editorconfig**: C# formatting rules
+- **eclipse-formatter.xml**: Java formatting rules for Eclipse formatter
+- **hxformat.json**: Haxe formatting rules
+
+## Eclipse Formatter
+
+The eclipse-formatter directory contains a Maven project that builds a standalone Eclipse code formatter:
+- **Source**: eclipse-formatter/src/main/java/com/esotericsoftware/spine/formatter/EclipseFormatter.java
+- **Build**: Automatically built by format-java.sh when the JAR doesn't exist or source is newer
+- **Output**: Only prints files that were actually modified
+
+## GitHub Actions Workflow
+
+The formatting check runs automatically on push and can be triggered manually:
+
+1. **Workflow file**: .github/workflows/format-check-new.yml
+2. **Process**:
+   - Sets up all required formatters and dependencies
+   - Runs all format scripts
+   - Captures any file changes to format-diff.txt
+   - Uploads diff as artifact
+   - Fails if any files were modified
+
+### Docker-based clang-format
+
+To ensure consistent formatting across local development and CI, the workflow uses Docker to run clang-format 18.1.8. The setup-clang-format-docker.sh script creates a wrapper that:
+- Mounts the project directory in the Docker container
+- Converts relative paths to absolute paths
+- Runs clang-format with the same version everywhere
+
+## Local Development
+
+To run formatters locally:
+
+```bash
+cd formatters
+./format-cpp.sh     # Format C/C++ files
+./format-csharp.sh  # Format C# files
+./format-dart.sh    # Format Dart files
+./format-haxe.sh    # Format Haxe files
+./format-java.sh    # Format Java files
+./format-ts.sh      # Format TypeScript files
+```
+
+Ensure you have the required tools installed for each formatter you want to run.
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